CRC Sta-Lube 85W-90 Gear Oil 1 Gallon — API/GL-4 Hypoid, Anti-Wear & Yellow-Metal Safe

CRC Sta-Lube 85W-90 API/GL-4 gear oil is a versatile hypoid transmission lubricant formulated with anti-rust and anti-wear EP additives that protect gears and yellow metals across a wide temperature range.

This one-gallon Sta-Lube bottle contains an API/GL-4-rated 85W-90 gear oil designed for reliable lubrication of manual transmissions, differentials and hypoid gear sets. The formula balances low pour-point flow for cold starts with thermal stability at elevated temperatures, while additive chemistry reduces wear and resists corrosion on copper, bronze and other non-ferrous components. It’s suitable where API/GL-3 and GL-4 fluids are specified and is packaged for shop or fleet use.

How does this oil perform in cold starts and high heat?

The 85W-90 viscosity offers fluidity at low temperatures to ensure quicker lubrication on startup, while retaining a stable film at operating temperatures to protect gear teeth under load. Its base oil and additive package were selected to maintain viscosity and reduce breakdown when heat builds during heavy use.

• Low pour point for easier cold-weather engagement
• High-temperature stability to maintain protective film
• EP additives reduce scuffing and pitting under pressure

Is it safe to use with copper, bronze and other yellow metals?

Yes — CRC Sta-Lube GL-4 gear oil is formulated to be non-corrosive to copper, bronze and similar non-ferrous alloys. That makes it appropriate for gearboxes and differential setups that incorporate brass or bronze bushings and bearings.

• Non-corrosive formulation to protect yellow metals
• Compatible with bearings and bushings made from non-ferrous alloys
• Helps prevent galvanic or chemical attack on sensitive components

What applications and equipment is this product intended for?

This multi-purpose oil is intended for automotive and heavy-duty applications requiring API/GL-3 or GL-4 performance. Use it in standard transmissions, manual gearboxes and many differentials — particularly hypoid gears where extreme-pressure protection is important.

• Manual transmissions for cars, trucks and buses
• Hypoid differentials and drive axles
• Equipment specifying API GL-3 or GL-4 oils

What protective benefits can I expect from the additive package?

The oil’s anti-wear and extreme-pressure (EP) additives form a protective layer on gear surfaces to reduce metal-to-metal contact and wear under loaded conditions. Anti-rust chemistry helps guard against corrosion when components are exposed to moisture or condensation.

• EP agents reduce scoring and gear tooth damage under heavy load
• Anti-rust additives limit corrosion in stored or intermittently used gearboxes
• Maintains lubrication film for longer service life between changes

Who is this for? CRC Sta-Lube API/GL-4 85W-90 gear oil suits mechanics, fleet managers, vintage and performance vehicle owners, and DIYers who need a dependable hypoid gear lubricant that’s safe on yellow metals. Choose this one-gallon option when you want a shop-ready supply for manual transmissions and differentials that require GL-3/GL-4 performance with anti-wear and anti-corrosion protection.